Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7917110 | Cognitive radio system A cognitive radio system includes: a state detecting device that scans a frequency band allocated to another radio system than the cognitive radio system to detect a first use-state of the frequency band; a first server including a first gathering unit that receives... | 03/29/2011 |
| 7340280 | Method of configuring base station, and base station A base station and a method of configuring a base station are provided in a cellular telecommunication system, wherein the base station comprises an electrically tunable duplex filter with a tuning range covering at least two parallel sub-bands used in the telecommu... | 03/04/2008 |
| 7333573 | Radio communication apparatus and method having automatic frequency control function A method for use in an apparatus for frequency error detection and automatic frequency control detects a frequency error by utilizing known symbols other than a data signal contained in an input signal. At least two known symbols located at positions somewhat distan... | 02/19/2008 |
| 7308238 | Automatic frequency controlling apparatus and method of mobile communication terminal An apparatus and method for performing automatic frequency control of a mobile communication terminal detects a current peak position value from a downlink pilot signal and then calculates a difference value (dev) between the current peak position and a previous pea... | 12/11/2007 |
| 7283796 | Electronic tuning system An electronic tuning system includes an electronic tuner for adjusting the predetermined control voltage of a voltage controlled oscillator (VCO) to tune the local frequency signal to radio waves on an arbitrary channel in accordance with channel selection informati... | 10/16/2007 |
| 7274918 | Apparatus for automatically finding an am radio program The invention relates to a method for automatically finding an AM radio program, by which an AM radio receiver is tuned through in discrete steps, such that, for each set AM frequency, the reception quality at the currently set AM frequency is determined, the field ... | 09/25/2007 |
| 7272374 | Dynamic selection of local oscillator signal injection for image rejection in integrated receivers A system and method are disclosed for dynamically selecting high-side injection or low-side injection of local oscillator mixing signals based upon an assessment of signal power within the input signal spectrum that could cause unwanted images in the processed signa... | 09/18/2007 |
| 7260140 | Correlator allocation control process for allocating correlator group as divided into shared correlators and dedicated correlators A delay profile calculator comprises dedicated correlators and shared correlators, and calculates the numbers of shared correlators allocated to respective users from the number of subscribing users and the total number of shared correlators. If the number of subscr... | 08/21/2007 |
| 7236755 | Broadcast wave receiving apparatus Herein disclosed is a broadcast wave receiving apparatus, comprising: first and second tuning circuits each having a resonance frequency; first controlling means for controlling one of the first and second tuning circuits to ensure that the resonance frequency of on... | 06/26/2007 |
| 7231195 | Variable gain control circuit and receiver apparatus using the circuit Disclosed is a variable gain control circuit for executing automatic-gain-control on a variable gain amplification block composed of a plurality of amplifiers on which discrete gain setting is executed by a programmable-gain-amp method. A baseband amplifier (a varia... | 06/12/2007 |
| 7224951 | PMA RX in coarse loop for high speed sampling A device and a method for processing high data rate serial data includes circuitry for recovering a clock based on the high data rate input data stream. A transceiver includes a coarse loop of a phase-locked loop that selectively provides a clock having accuracy tha... | 05/29/2007 |
| 7145970 | Frequency offset detector for AFC under rayleigh fading A frequency offset detector for AFC under Rayleigh fading. The AFC includes a variable phase generator, an exponential term ej Δ107 t multiplied on an incoming signal, a low-pass filter, a gain amplifier, a multiplier, and an offset detector. The offset ... | 12/05/2006 |
| 7127010 | Oscillator controlling A receiver local oscillator is always tuned to a frequency that lies within a range of reception frequencies of the receiver. The oscillator is tuned to a frequency less than and above the received frequency when the received frequency is above and below a threshold... | 10/24/2006 |
| 7098845 | Apparatus for generating an integrator timing reference from a local oscillator signal A receiver circuit including an oscillator, a mixer coupled to the oscillator, a switch coupled to an output of the mixer, and an envelope detector coupled to the oscillator, such that the envelope detector generates a timing signal for actuating the switch based on... | 08/29/2006 |
| 7050802 | Cellular communication device with scanning receiver and continuous mobile communication system employing same A receiver receives communication signals on an assigned frequency channel while monitoring the signals received on other frequency channels. A communication processor processes the received communication signals from the current base station while a wideband digiti... | 05/23/2006 |
| 7047205 | Management of the flow of persons in relation to centers of crowd concentration via priority control A method and system for the loading of patrons at multiple attractions at an entertainment includes the first-in first-out line and a priority based line. A cellular telephone is used to obtain and claim priority status. In other forms different priorities are estab... | 05/16/2006 |
| 7043216 | Portable radio terminal and AFC control method A portable radio terminal for realizing automatic frequency control (AFC) for automatically controlling the oscillation frequency of an oscillator includes a unit for intermittently performing AFC operation, and a unit for shortening an AFC operation stop period whe... | 05/09/2006 |
| 7039372 | Method and system for frequency up-conversion with modulation embodiments A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In ... | 05/02/2006 |
| 7035605 | Method and device for automatic control of the frequency of a local oscillator in a DS-CDMA type receiver A method for controlling frequency of a local oscillator in a DS-CDMA type receiver includes transforming a known spread spectrum signal into a sampled digital signal formed of symbols with a despreaded frequency spectrum, and determining a residual frequency error ... | 04/25/2006 |
| 7031680 | Stop-on-station method and apparatus A method for stopping on a radio station includes calculating a radio signal quality (205) using a multipath echo indicator and determining if the radio signal quality is greater than a predetermined signal quality threshold (210). A zero crossings ind... | 04/18/2006 |
| 6999746 | Image rejection mixer An image rejection mixer of reduced power dissipation includes a signal distributor supplied with local signals having a phase difference to distribute the local signals, a first and a second signal mixer for mixing the distributed local signals and RF signals havin... | 02/14/2006 |
| 6985705 | Radio frequency control for communication systems The present invention provides for a system and method for improvement of radio transmitter and receiver frequency accuracy for a local radio communication unit that communicates digital data with a remote communication unit. In the local unit the received radio sig... | 01/10/2006 |
| 6968165 | Frequency scanning receiver permitting quick PPL setting A frequency scanning receiver minimizes the time needed for setting the frequency of a phased lock loop of a first local oscillator. The frequency scanning receiver is configured so that when the reference frequency of the PLL of the first local oscillator has been ... | 11/22/2005 |
| 6941120 | Apparatus and method for automatically programming frequency scanning radio receivers A frequency scanning radio receiver scans and receives transmissions on discrete radio frequencies. The frequency scanning radio receiver is programmable to monitor frequencies in a geographical area where the receiver is located. The receiver is coupled to a commun... | 09/06/2005 |
| 6934524 | Fine-stage automatic frequency compensation in post-detection short-range wireless applications A data-pattern feedback mechanism is introduced into the peak detection process of an automatic frequency compensation system in a Gaussian Frequency Shift Keying (GFSK) modulated system, providing fast and accurate fine-stage automatic frequency compensation (AFC).... | 08/23/2005 |
| 6816715 | Wideband receiver and channel scanning method A wideband receiver (10) comprises a frequency converter (16) for converting the frequency of a signal inputted through an antenna (12) by using a local oscillation signal from a local oscillator (18); a wideband filter (20) for re... | 11/09/2004 |
| 6798853 | System and method for compensating for frequency offset The present invention is directed toward an automatic frequency control system for compensating for frequency offset of received data signals in a radio frequency communication system. A reference sample index for the data to be compensated is first determined as a ... | 09/28/2004 |
| 6735428 | Wireless communication apparatus A wireless communication apparatus prevents desensitization in a line signal frequency caused by clock signal harmonic. The wireless communication apparatus is provided with a receiver/demodulator for receiving a line signal of a predetermined frequency and for demo... | 05/11/2004 |
| 6704552 | Mobile communication apparatus with an automatic frequency controller A plurality of finger units despread a received signal with a first spread code to output pilot signals of a receiving channel which has been spread with the first spread code. An AFC unit despreads the received signal with a second spread code to output ... | 03/09/2004 |
| 6640093 | Broadcast receiver A receiver for broadcast signals, e.g. DAB, FM, DVB, and digital or analog short-wave RF broadcast signals according to the present invention includes a polyfunctional circuit (5) that can be switched into three modes and performs the digital frequency de... | 10/28/2003 |
| 6631255 | Multi-carrier receiver for a wireless telecommunication system A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) inclu... | 10/07/2003 |
| 6571088 | Automatic frequency control circuit In an AFC ((Automatic Frequency Control) circuit, a frequency offset estimating circuit (11) produces a lock signal (102) if a calculated frequency error becomes smaller than a predetermined value. Then, a CPU (13) produces a control signal (104) to stop ... | 05/27/2003 |
| 6535553 | Passband equalizers with filter coefficients calculated from modulated carrier signals A digital communications radio receiver, as for television, digitizes a final intermediate-frequency signal offset from zero frequency no more than a few megahertz. This digitized final I-F signal is passed through an adaptive equalizer before being synch... | 03/18/2003 |
| 6493544 | FM signal quality detector during seek A vehicle radio includes a microprocessor-controlled tuner having a seek function. The tuner generates a station detect signal when a sufficiently strong signal is received, and the tuner also generates a multipath detect signal when a received signal exh... | 12/10/2002 |
| 6314145 | Tracking carrier timing The timing of a carrier signal is tracked in a receiver. The receiver receives a signal produced by a transmitter having a single frequency source which is used to generate a reference clock frequency and a carrier signal frequency, there being a fixed, p... | 11/06/2001 |
| 6275699 | Mobile communication terminal for rapid adjustment of a reference frequency to a target frequency In a mobile communication terminal, a switch 10 is initially set to an initial setting mode at time of turning on a power supply. A reference oscillator control circuit is initialized, and in this state, the output frequency of a reference oscillator is u... | 08/14/2001 |
| 6252635 | Automatic tuning frequency or channel number installation Upon installation of a broadcast receiver, for example, a television receiver, the different tuning frequencies/channel numbers are to be stored in a memory of the broadcast receiver. To facilitate the installation, the network provider transmits a list o... | 06/26/2001 |
| 6192088 | Carrier recovery system A digital carrier recovery system includes at least two modes of operation, namely, an acquisition mode and a tracking mode. The bandwidth of the carrier recovery loop filter is different for the acquisition mode and the tracking mode. In the acquisition ... | 02/20/2001 |
| 6181923 | Automatic frequency control circuit and method of automatic frequency control The present invention relates to the automatic frequency control circuit and the method of automatic frequency control. The automatic frequency control circuit for processing frequency control of a received signal frequency based on an incoming received s... | 01/30/2001 |
| 6038433 | Method for automatically searching a frequency range for signal channels in a receiver for digitally modulated signals, and receiver for applying such a method A method for automatically searching a frequency range for signal channels in a receiver for digitally modulated signals is described, each channel having a center frequency, a symbol rate, and a modulation type. The method comprises the steps of scanning... | 03/14/2000 |
